Smokeless furnace.



No. 638,034. Patented Nov. 28, I899. c. TIMMANN.

SMOKELESS FURNACE,

(Application filed July 25, 1899.) {No Model.) n; 2 Sheets-Sheet l,

m: uanm'l Firm cu. mom-urban. wwuuaml u No. 633,034. Patented Nov. 28,I899. C. TIMMANN.

SMUKELESS FURNACE.

(Application filed July 25, 1899.) (No Model.) 2 Sheets-8heet 2.

Z-WL/ I W A/ JVWMJ- y UNITED STATES PATENT OFFICE.

CONRAD TIMMANN, OF HAMBURG, GERMANY.

SMOKELESS FURNACE.

PECI CATI N forming part of Letters Patent No. 638,034, dated November28, 1899.

I Application filed July 25, 1899. Serial No. 725,040. (No model.)

To whom it may concern:

Be it known that I, CONRAD TIMMANN, furniture remover, a subject of theEmperor of Germany, residing at Hoheluft-Chaussee 12,

occurs underneath on the grate in order that a rational combustion maybe attained are attended with the disadvantage that as a result of theircomplicated construction the performance of repairs entails considerableeXpense,and, furthermore, that the grate area is barely sufficient forthe production of the required amount of steam, because a large portionof the coal'fed thereto does not burn.

This invention relates to a direct fired smokeless furnace wherein thecombustion takes place on a grate, but which is exempt from theaforesaid disadvantages. This smokeless furnace enables combustion to goon over the entire area of the grate, being suitable for any boiler,precluding burning out the top of the fire-box, and it is not retardedby the admission of cold air when the fire-door is opened, such airrather contributing to secure a more perfect combustion of the gases.

In the drawings forming part of this specification, Figure 1 shows inlongitudinal sec: tion the invention as applied to an ordinary type ofboiler. Fig. 2 shows a cross-section of same on the line 00 0c, and Fig.3 a similar cross-section on the line y y.

For the purposes of thisinvention the front portion of the flue a Wherethe furnace is situated is formed at eitherside withlongitudinally-extending pockets 1) and inwardlyprojecting constrictionso. Firing up is effected, as in anyordinary furnace, by lighting a fireon the grate i, situated below the cen-.

ter of the fire-box. This done coal is piled up on the fire in suchquantity that but a small space is leftunoccupied at the top. This coalis laterally supported on the constrictions c, which also serve to shutoff communication between the pockets and the space above the layer ofcoal. The coals fall in a laterally-slanting direction below theconstrictions c, as shown in Fig. 2, the spaces (1 being left freethrough which the burning gases pass, air being supplied to the underside of the grate in order to maintain the combustion of "the fuel. Thecold coals fed in at the top are first deprived of their gaseousconstituents by distillation, whereupon the gas-free coal-1'. a, cokedresidue'falls onto the grate 7; and burns without smoke. The glowingfire underneath the constrictions c throws out great heat, which isconducted to the rear part of the flue through the openingsfand g in thefire-bridge e above the grate, these aperturesf and 9 being the onlypassages through the fire-bridge, so that any smoke that may be formedabove the coal is drawn along with the air entering at the openfire-door or through apertures in the same through the fire on the grateand led along with the smokeless hot gases through the aperturesfand gto the rear part of the boilerflue. By this methodof depriving the coalof its gaseous constituents more perfect combustion is insured than canbe attained in any other kind of furnace, and the fumes issuing from thechimney are quite free from black smoke.

The frequent attention required in other methods in order to ascertainwhether more coal is needed is here rendered superfluous, because thestoking-chamber is quite filled with coal. The grate being an ordinaryflat grate, the furnace differs from the usual types only in themodified form of the fire-box and fire-bridge.

The superiority of this furnace in point of simplicity is evident, andit can easily be" demonstrated that it insures a perfectly smokelesscombustion,as it is only a question of the form of the fire-box. Thismethod of firing can be applied to any type of boiler at little expense,which in view of the advantages accruing will be quickly repaid by theeconomy efiected in the fuel.

What I claim, and desire to secure by Letters Patent, is-

1. The fire-box herein described constructed with a fire-grate 1longitudinally-extending lateral pockets 1) 17 forming gas-conduits d,cl on either side above the grate and constrictions c, a forming aclosed magazine products of combustion are delivered, sub- 10 stantiallyas described.

In Witness whereof I subscribe my signature in presence of twowitnesses.

CONRAD TIMMANN.

Witnesses:

E. H. L. MUMMENHOFF, GEO. LANDRE.

